Manning said earlier this month that the workouts will be crucial as he attempts to gel with his first new team since 1998. Manning is also attempting to come back from a neck injury that required multiple surgeries and knocked him out for the entire 2011 season, precipitating his release from the Colts.

"I've seen that firsthand over the course of my career -- that offseason work makes a big difference come fall," Manning said in a video posted on the Broncos' official website. "You can't just show up in September and expect to be successful, expect to win games. And so this offseason work is critical."